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Doc Serwis/Expert Blog
Expert Blog

Practical Car Service Advice You Can Use Today

Actionable, no-fluff guides from our mechanics. Learn how to spot issues early, reduce repair costs, and keep your car reliable.

7 articles
Updated regularly
When to replace tires with winter tires: the 7 °C rule, timing and prices in 2026

Featured article

When to replace tires with winter tires: the 7 °C rule, timing and prices in 2026

Wondering if you should already replace tires with winter tires? Many drivers are guided by the date on the calendar or wait for the first snow. In fact, neither is a reliable guide. The only practical criterion based on the physics of rubber is the temperature limit of +7 °C.

November 2, 2026

5 min read

Read article

Latest articles

Short, practical reads focused on diagnostics, maintenance, and repair decisions.

The car pulls to the side: when is wheel alignment to blame, and when is the problem more serious?
September 6, 20265 min read

The car pulls to the side: when is wheel alignment to blame, and when is the problem more serious?

Does the car pull to the right or left? The reason is not always camber-toe. We figure out when it is enough to adjust the geometry of the wheels, and when it is worth checking the tires, suspension and brake system.

Preparing the air conditioner for the season: why is "just refilling" not enough?
February 19, 20265 min read

Preparing the air conditioner for the season: why is "just refilling" not enough?

With the first warm rays of the sun, we reach for the A/C button, waiting for a pleasant coolness. But often, instead of freshness, we get a weak airflow or, worse, an unpleasant smell of dampness.

Why brakes squeak: it's not always about the pads
February 19, 20265 min read

Why brakes squeak: it's not always about the pads

An unpleasant squeak or grinding sound when braking is not only an irritant to the ears, but also a serious signal from your car.

When to change the lubricant in an automatic transmission? Debunking myths and discovering reality
February 19, 20265 min read

When to change the lubricant in an automatic transmission? Debunking myths and discovering reality

There is perhaps the most controversy among car owners around the maintenance of automatic transmissions (automatic transmission). Some say that the lubricant is "eternal", others say that replacing it can "kill" the box. Where is the truth?

Engine endoscopy: why is it a mandatory step of checking before buying a car?
February 19, 20265 min read

Engine endoscopy: why is it a mandatory step of checking before buying a car?

Buying a used car is always a lottery. The exterior shine of the body and the clean interior often hide critical problems under the hood.

Why does catalyst fail?
February 19, 20263 min read

Why does catalyst fail?

The catalytic converter is an important component of the exhaust system that is responsible for the environmental friendliness of emissions. However, due to its fragile structure, it often becomes the "weak link" in the car.

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